summaryrefslogtreecommitdiff
path: root/libavcodec/hevc_sei.c (plain)
blob: 8fc026cf1e17fe8f91ba6c04c27f8ccc9c6eae50
1/*
2 * HEVC Supplementary Enhancement Information messages
3 *
4 * Copyright (C) 2012 - 2013 Guillaume Martres
5 * Copyright (C) 2012 - 2013 Gildas Cocherel
6 * Copyright (C) 2013 Vittorio Giovara
7 *
8 * This file is part of FFmpeg.
9 *
10 * FFmpeg is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
15 * FFmpeg is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with FFmpeg; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25#include "golomb.h"
26#include "hevcdec.h"
27
28enum HEVC_SEI_TYPE {
29 SEI_TYPE_BUFFERING_PERIOD = 0,
30 SEI_TYPE_PICTURE_TIMING = 1,
31 SEI_TYPE_PAN_SCAN_RECT = 2,
32 SEI_TYPE_FILLER_PAYLOAD = 3,
33 SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35 = 4,
34 SEI_TYPE_USER_DATA_UNREGISTERED = 5,
35 SEI_TYPE_RECOVERY_POINT = 6,
36 SEI_TYPE_SCENE_INFO = 9,
37 SEI_TYPE_FULL_FRAME_SNAPSHOT = 15,
38 SEI_TYPE_PROGRESSIVE_REFINEMENT_SEGMENT_START = 16,
39 SEI_TYPE_PROGRESSIVE_REFINEMENT_SEGMENT_END = 17,
40 SEI_TYPE_FILM_GRAIN_CHARACTERISTICS = 19,
41 SEI_TYPE_POST_FILTER_HINT = 22,
42 SEI_TYPE_TONE_MAPPING_INFO = 23,
43 SEI_TYPE_FRAME_PACKING = 45,
44 SEI_TYPE_DISPLAY_ORIENTATION = 47,
45 SEI_TYPE_SOP_DESCRIPTION = 128,
46 SEI_TYPE_ACTIVE_PARAMETER_SETS = 129,
47 SEI_TYPE_DECODING_UNIT_INFO = 130,
48 SEI_TYPE_TEMPORAL_LEVEL0_INDEX = 131,
49 SEI_TYPE_DECODED_PICTURE_HASH = 132,
50 SEI_TYPE_SCALABLE_NESTING = 133,
51 SEI_TYPE_REGION_REFRESH_INFO = 134,
52 SEI_TYPE_MASTERING_DISPLAY_INFO = 137,
53 SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO = 144,
54};
55
56static int decode_nal_sei_decoded_picture_hash(HEVCContext *s)
57{
58 int cIdx, i;
59 uint8_t hash_type;
60 //uint16_t picture_crc;
61 //uint32_t picture_checksum;
62 GetBitContext *gb = &s->HEVClc->gb;
63 hash_type = get_bits(gb, 8);
64
65 for (cIdx = 0; cIdx < 3/*((s->sps->chroma_format_idc == 0) ? 1 : 3)*/; cIdx++) {
66 if (hash_type == 0) {
67 s->is_md5 = 1;
68 for (i = 0; i < 16; i++)
69 s->md5[cIdx][i] = get_bits(gb, 8);
70 } else if (hash_type == 1) {
71 // picture_crc = get_bits(gb, 16);
72 skip_bits(gb, 16);
73 } else if (hash_type == 2) {
74 // picture_checksum = get_bits_long(gb, 32);
75 skip_bits(gb, 32);
76 }
77 }
78 return 0;
79}
80
81static int decode_nal_sei_mastering_display_info(HEVCContext *s)
82{
83 GetBitContext *gb = &s->HEVClc->gb;
84 int i;
85 // Mastering primaries
86 for (i = 0; i < 3; i++) {
87 s->display_primaries[i][0] = get_bits(gb, 16);
88 s->display_primaries[i][1] = get_bits(gb, 16);
89 }
90 // White point (x, y)
91 s->white_point[0] = get_bits(gb, 16);
92 s->white_point[1] = get_bits(gb, 16);
93
94 // Max and min luminance of mastering display
95 s->max_mastering_luminance = get_bits_long(gb, 32);
96 s->min_mastering_luminance = get_bits_long(gb, 32);
97
98 // As this SEI message comes before the first frame that references it,
99 // initialize the flag to 2 and decrement on IRAP access unit so it
100 // persists for the coded video sequence (e.g., between two IRAPs)
101 s->sei_mastering_display_info_present = 2;
102 return 0;
103}
104
105static int decode_nal_sei_frame_packing_arrangement(HEVCContext *s)
106{
107 GetBitContext *gb = &s->HEVClc->gb;
108
109 get_ue_golomb_long(gb); // frame_packing_arrangement_id
110 s->sei_frame_packing_present = !get_bits1(gb);
111
112 if (s->sei_frame_packing_present) {
113 s->frame_packing_arrangement_type = get_bits(gb, 7);
114 s->quincunx_subsampling = get_bits1(gb);
115 s->content_interpretation_type = get_bits(gb, 6);
116
117 // the following skips spatial_flipping_flag frame0_flipped_flag
118 // field_views_flag current_frame_is_frame0_flag
119 // frame0_self_contained_flag frame1_self_contained_flag
120 skip_bits(gb, 6);
121
122 if (!s->quincunx_subsampling && s->frame_packing_arrangement_type != 5)
123 skip_bits(gb, 16); // frame[01]_grid_position_[xy]
124 skip_bits(gb, 8); // frame_packing_arrangement_reserved_byte
125 skip_bits1(gb); // frame_packing_arrangement_persistence_flag
126 }
127 skip_bits1(gb); // upsampled_aspect_ratio_flag
128 return 0;
129}
130
131static int decode_nal_sei_display_orientation(HEVCContext *s)
132{
133 GetBitContext *gb = &s->HEVClc->gb;
134
135 s->sei_display_orientation_present = !get_bits1(gb);
136
137 if (s->sei_display_orientation_present) {
138 s->sei_hflip = get_bits1(gb); // hor_flip
139 s->sei_vflip = get_bits1(gb); // ver_flip
140
141 s->sei_anticlockwise_rotation = get_bits(gb, 16);
142 skip_bits1(gb); // display_orientation_persistence_flag
143 }
144
145 return 0;
146}
147
148static int decode_pic_timing(HEVCContext *s)
149{
150 GetBitContext *gb = &s->HEVClc->gb;
151 HEVCSPS *sps;
152
153 if (!s->ps.sps_list[s->active_seq_parameter_set_id])
154 return(AVERROR(ENOMEM));
155 sps = (HEVCSPS*)s->ps.sps_list[s->active_seq_parameter_set_id]->data;
156
157 if (sps->vui.frame_field_info_present_flag) {
158 int pic_struct = get_bits(gb, 4);
159 s->picture_struct = AV_PICTURE_STRUCTURE_UNKNOWN;
160 if (pic_struct == 2) {
161 av_log(s->avctx, AV_LOG_DEBUG, "BOTTOM Field\n");
162 s->picture_struct = AV_PICTURE_STRUCTURE_BOTTOM_FIELD;
163 } else if (pic_struct == 1) {
164 av_log(s->avctx, AV_LOG_DEBUG, "TOP Field\n");
165 s->picture_struct = AV_PICTURE_STRUCTURE_TOP_FIELD;
166 }
167 get_bits(gb, 2); // source_scan_type
168 get_bits(gb, 1); // duplicate_flag
169 }
170 return 1;
171}
172
173static int decode_registered_user_data_closed_caption(HEVCContext *s, int size)
174{
175 int flag;
176 int user_data_type_code;
177 int cc_count;
178
179 GetBitContext *gb = &s->HEVClc->gb;
180
181 if (size < 3)
182 return AVERROR(EINVAL);
183
184 user_data_type_code = get_bits(gb, 8);
185 if (user_data_type_code == 0x3) {
186 skip_bits(gb, 1); // reserved
187
188 flag = get_bits(gb, 1); // process_cc_data_flag
189 if (flag) {
190 skip_bits(gb, 1);
191 cc_count = get_bits(gb, 5);
192 skip_bits(gb, 8); // reserved
193 size -= 2;
194
195 if (cc_count && size >= cc_count * 3) {
196 const uint64_t new_size = (s->a53_caption_size + cc_count
197 * UINT64_C(3));
198 int i, ret;
199
200 if (new_size > INT_MAX)
201 return AVERROR(EINVAL);
202
203 /* Allow merging of the cc data from two fields. */
204 ret = av_reallocp(&s->a53_caption, new_size);
205 if (ret < 0)
206 return ret;
207
208 for (i = 0; i < cc_count; i++) {
209 s->a53_caption[s->a53_caption_size++] = get_bits(gb, 8);
210 s->a53_caption[s->a53_caption_size++] = get_bits(gb, 8);
211 s->a53_caption[s->a53_caption_size++] = get_bits(gb, 8);
212 }
213 skip_bits(gb, 8); // marker_bits
214 }
215 }
216 } else {
217 int i;
218 for (i = 0; i < size - 1; i++)
219 skip_bits(gb, 8);
220 }
221
222 return 0;
223}
224
225static int decode_nal_sei_user_data_registered_itu_t_t35(HEVCContext *s, int size)
226{
227 uint32_t country_code;
228 uint32_t user_identifier;
229
230 GetBitContext *gb = &s->HEVClc->gb;
231
232 if (size < 7)
233 return AVERROR(EINVAL);
234 size -= 7;
235
236 country_code = get_bits(gb, 8);
237 if (country_code == 0xFF) {
238 skip_bits(gb, 8);
239 size--;
240 }
241
242 skip_bits(gb, 8);
243 skip_bits(gb, 8);
244
245 user_identifier = get_bits_long(gb, 32);
246
247 switch (user_identifier) {
248 case MKBETAG('G', 'A', '9', '4'):
249 return decode_registered_user_data_closed_caption(s, size);
250 default:
251 skip_bits_long(gb, size * 8);
252 break;
253 }
254 return 0;
255}
256
257static int active_parameter_sets(HEVCContext *s)
258{
259 GetBitContext *gb = &s->HEVClc->gb;
260 int num_sps_ids_minus1;
261 int i;
262 unsigned active_seq_parameter_set_id;
263
264 get_bits(gb, 4); // active_video_parameter_set_id
265 get_bits(gb, 1); // self_contained_cvs_flag
266 get_bits(gb, 1); // num_sps_ids_minus1
267 num_sps_ids_minus1 = get_ue_golomb_long(gb); // num_sps_ids_minus1
268
269 if (num_sps_ids_minus1 < 0 || num_sps_ids_minus1 > 15) {
270 av_log(s->avctx, AV_LOG_ERROR, "num_sps_ids_minus1 %d invalid\n", num_sps_ids_minus1);
271 return AVERROR_INVALIDDATA;
272 }
273
274 active_seq_parameter_set_id = get_ue_golomb_long(gb);
275 if (active_seq_parameter_set_id >= HEVC_MAX_SPS_COUNT) {
276 av_log(s->avctx, AV_LOG_ERROR, "active_parameter_set_id %d invalid\n", active_seq_parameter_set_id);
277 return AVERROR_INVALIDDATA;
278 }
279 s->active_seq_parameter_set_id = active_seq_parameter_set_id;
280
281 for (i = 1; i <= num_sps_ids_minus1; i++)
282 get_ue_golomb_long(gb); // active_seq_parameter_set_id[i]
283
284 return 0;
285}
286
287static int decode_nal_sei_prefix(HEVCContext *s, int type, int size)
288{
289 GetBitContext *gb = &s->HEVClc->gb;
290
291 switch (type) {
292 case 256: // Mismatched value from HM 8.1
293 return decode_nal_sei_decoded_picture_hash(s);
294 case SEI_TYPE_FRAME_PACKING:
295 return decode_nal_sei_frame_packing_arrangement(s);
296 case SEI_TYPE_DISPLAY_ORIENTATION:
297 return decode_nal_sei_display_orientation(s);
298 case SEI_TYPE_PICTURE_TIMING:
299 {
300 int ret = decode_pic_timing(s);
301 av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", type);
302 skip_bits(gb, 8 * size);
303 return ret;
304 }
305 case SEI_TYPE_MASTERING_DISPLAY_INFO:
306 return decode_nal_sei_mastering_display_info(s);
307 case SEI_TYPE_ACTIVE_PARAMETER_SETS:
308 active_parameter_sets(s);
309 av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", type);
310 return 0;
311 case SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35:
312 return decode_nal_sei_user_data_registered_itu_t_t35(s, size);
313 default:
314 av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", type);
315 skip_bits_long(gb, 8 * size);
316 return 0;
317 }
318}
319
320static int decode_nal_sei_suffix(HEVCContext *s, int type, int size)
321{
322 GetBitContext *gb = &s->HEVClc->gb;
323
324 switch (type) {
325 case SEI_TYPE_DECODED_PICTURE_HASH:
326 return decode_nal_sei_decoded_picture_hash(s);
327 default:
328 av_log(s->avctx, AV_LOG_DEBUG, "Skipped SUFFIX SEI %d\n", type);
329 skip_bits_long(gb, 8 * size);
330 return 0;
331 }
332}
333
334static int decode_nal_sei_message(HEVCContext *s)
335{
336 GetBitContext *gb = &s->HEVClc->gb;
337
338 int payload_type = 0;
339 int payload_size = 0;
340 int byte = 0xFF;
341 av_log(s->avctx, AV_LOG_DEBUG, "Decoding SEI\n");
342
343 while (byte == 0xFF) {
344 byte = get_bits(gb, 8);
345 payload_type += byte;
346 }
347 byte = 0xFF;
348 while (byte == 0xFF) {
349 byte = get_bits(gb, 8);
350 payload_size += byte;
351 }
352 if (s->nal_unit_type == HEVC_NAL_SEI_PREFIX) {
353 return decode_nal_sei_prefix(s, payload_type, payload_size);
354 } else { /* nal_unit_type == NAL_SEI_SUFFIX */
355 return decode_nal_sei_suffix(s, payload_type, payload_size);
356 }
357}
358
359static int more_rbsp_data(GetBitContext *gb)
360{
361 return get_bits_left(gb) > 0 && show_bits(gb, 8) != 0x80;
362}
363
364int ff_hevc_decode_nal_sei(HEVCContext *s)
365{
366 int ret;
367
368 do {
369 ret = decode_nal_sei_message(s);
370 if (ret < 0)
371 return(AVERROR(ENOMEM));
372 } while (more_rbsp_data(&s->HEVClc->gb));
373 return 1;
374}
375
376void ff_hevc_reset_sei(HEVCContext *s)
377{
378 s->a53_caption_size = 0;
379 av_freep(&s->a53_caption);
380}
381
generated by cgit at 2024-05-17 18:34:41 (GMT)